The Doc checked my PSA back in September and all was good for another year.

I've never had this problem. In the winter I'll pump the tires to 110-120 psi, go for a ride in sub 20F, come home and park the bike in my heated basement.

But consider this thought experiment: Let's say my tires were 60F at full inflation, and 85% at 20F while riding. Wouldn't they return to something close to 100% after the ride when parked again in a 60F basement? Certainly they would not rebound to 115%.

Do you start out with your tires at 34F, inflate them to your desired PSI, ride the bike in 34F temps, and park in 70F? This would explain the increase in PSI and the explosive nature of your tires. Solution: Park your bike next to your bed at night.